低温高速永磁电机转子护套设计及其强度优化

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关键词：低温高速永磁电机；转子强度；响应面法；多目标粒子群优化;轻量化设计DOI：10.15938/j. emc.2025.09.008中图分类号：TM355 文献标志码：A 文章编号：1007-449X（2025）09-0082-11

Abstract：To address the structural strength optimization of the rotor in a cryogenic high-speed surfacemounted permanent magnet motor，a three-dimensional finite element model was established based on multi-physics coupling methodology.Systematic analysis of the stress distribution characteristics in the permanent magnets and titanium alloy retaining sleeve was conducted under both room temperature （25°C ） and cryogenic ） conditions. Model validation through comparison between simulation and theoretical results confirmed its accuracy，while revealing distinctive stress distribution pattrns under cryogenic environments. A cooperative optimization framework integrating response surface methodology （RSM）and multi-objective particle swarm optimization （MOPSO）was developed. The process initiated with RSM to construct second-order regression models characterizing the nonlinear relationships between design variables （sleeve thickness and interference fit） and stress parameters. Subsequently，MOPSO was implemented to perform global optimization with the objectives of minimizing permanent magnet radial/tangential stresses，sleeve von Mises stress，and contact pressure，ultimately identifying the Paretooptimal solution set. Results demonstrate that the proposed methodology effectively resolves multi-objective conflicts，significantly enhances optimization efficiency and solution quality，and achieves lightweight design without compromising mechanical integrity. The optimized configuration promotes more uniform stress distribution within the sleeve，reduces stress concentration risks，and decreases energy loss，thereby providing theoretical foundation for enhanced energy eficiency and operational reliability in cryogenic high-speed motor applications.

Keywords ：low-temperature high-speed permanent magnet motor; rotor strength ；response surface method（RSM）；multi-objective particle swarm optimization （MOPSO） ； lightweight design

0引言

液化天然气（liquefiednatural gas，LNG）作为一种高效、清洁的能源载体，在全球能源消费中扮演着越来越重要的角色[]。（剩余14274字）